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1·The sensor construction is that one Bragg grating is stuck on the inner center of two bars against each other, and the reinforcement volume as well as the diameter will expand due to corrosion.

钢筋腐蚀将导致钢筋体积大大增加，混凝土保护层开裂、剥落，结构承载力下降，甚至倒塌。